BOLD Insider Trading Activity and SEC Form 4 Filings
BOLD insider trading summary
Over the past 12 months, insiders at Boundless Bio, Inc. (BOLD) reported 58 open-market purchases worth $3.4M by 2 insiders and 15 sales worth $627K by 15 insiders on SEC Form 4. Net insider buying was $2.8M.
Latest BOLD insider buys and sells
| Date | Insider | Role | Type | Value |
|---|---|---|---|---|
| Nov 5, 2026 | Kevin Tang | Insider | Buy | $20K (8,390 @ $2.40) |
| Nov 5, 2026 | Tang Capital Management LLC | 10% Owner | Buy | $20K (8,390 @ $2.40) |
| Nov 4, 2026 | Tang Capital Management LLC | 10% Owner | Buy | $1K (517 @ $2.40) |
| Nov 4, 2026 | Kevin Tang | Insider | Buy | $1K (517 @ $2.40) |
| Nov 3, 2026 | Kevin Tang | Insider | Buy | $5K (2,255 @ $2.40) |
| Nov 3, 2026 | Tang Capital Management LLC | 10% Owner | Buy | $5K (2,255 @ $2.40) |
| Oct 27, 2026 | Kevin Tang | Insider | Buy | $26K (10,707 @ $2.40) |
| Oct 27, 2026 | Tang Capital Management LLC | 10% Owner | Buy | $26K (10,707 @ $2.40) |
| Oct 26, 2026 | Kevin Tang | Insider | Buy | $23K (9,606 @ $2.38) |
| Oct 26, 2026 | Tang Capital Management LLC | 10% Owner | Buy | $23K (9,606 @ $2.38) |
Source: SEC Form 4 filings. Open-market purchases (code P) and sales (code S) only; option exercises, grants and gifts are excluded.